Abstract
Jagoi P .• J. Bouda. J. Geryk: The Plasma LefJeZs of Vitamin A. E and Carotene in Cows in Late Pregnancy and in Their Foetuses. Acta vet. Brno. 48.1979: 19-23. Experiments involving 20 cows in late pregnancy and their foteuses aged 8-9 months were conducted to study the blood plasma content of the vitamins A. E and carotene and the liver vitamin A content of these individuals. The vitamin A content of the foetal plasma wss more than two times lower than that of the dams. and the foetal liver content of vitamin A was approximately ten times lower than the values found in the dams. Similarly. much lower plasma content of vitamin E and carotene were determined in the foetuses than in their mothers. These differences were statistically signi ficant. The results of the study indicated that the bovine foetus and newborn calf have only minimum stores of the above-mentioned vitamins and they depend on early and abundant feeding of colostrum to meet their requirements.
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